Year	current US$
1995	7227570522.12207
1996	8278597077.17948
1997	8046727186.29474
1998	7473714355.41095
1999	7037108337.80329
2000	6632255711.11557
2001	6533203884.87023
2002	5899675198.47441
2003	5802372298.2412
2004	7453242868.06301
2005	8312915168.54051
2006	10749053636.6377
2007	15059831535.6958
2008	20904688934.5281
2009	18787614471.5864
2010	22917124910.5506
2011	28785379968.439
2012	28116646133.5536
2013	33153449793.0443
2014	35311098984.1316
2015	31841843064.7248
2016	31926224462.9193
2017	34829795497.7803
2018	35889215057.0273
2019	33840040283.0872
2020	31353709365.8705
2021	35184118793.8752